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How can I make my cider sweet and sparkling without bursting bottles?

Say how sweet and how fizzy you want it, how you will serve it and what equipment and treatments you will use, and this sets out every route that gets there — the ones open to you now, the ones that need one more thing, and the hazard each one carries.

Sweet and sparkling route finder

Sweetness wanted
Carbonation wanted
Served from
What you have, or are willing to use

  • For dissolving gas into a finished cider rather than fermenting it in.

  • For moving an already carbonated cider into bottles without losing the gas.

  • Every bottle, every day — not most of them, and not after a week in the garage.

  • Permitted additives in most places, with limits that differ by country.

  • Sweeteners cider yeast cannot ferment. They taste different from sugar and are excluded by several protected names.

  • Needs suitable fruit, a cold cellar and patience, and does not always work.

  • For heat-treating sealed bottles. The hazardous route; read the warning before choosing it.

Sugar, live yeast and a sealed bottle make a fermentation nobody is watching, and the pressure it builds has no ceiling but the sugar. Every sweet bottled route either removes one of the three — the sugar from the bottle, the yeast’s ability to work, or the seal — or depends on a condition, cold or starvation, that has to hold for the bottle’s whole life.

Making perry? Taste it dry before choosing anything below. Perry pears carry sorbitol, which cider yeast does not ferment, so a perry fermented to dryness keeps a soft sweetness that adds nothing to the pressure in a bottle. It is gentler than sugar and varies by variety, so it may or may not be enough; if it is not, the routes below apply to perry exactly as to cider. Sorbitol and why perry behaves differently

Open to you (1)

  • Low risk

    Package it dry; sweeten it in the glass

    Bottle or keg a dry cider, still or sparkling by any of the dry routes, and add juice or syrup to each glass as it is poured.

    Nothing in the package can referment, because the sugar never goes into it. The cost is that the sweetness is added at the table rather than made in the cider.

    Back-sweetening · Priming

Open with something you have not ticked (5)

  • Lower risk only if every step holds

    Sweeten with a non-fermentable sweetener, then prime

    Ferment dry, sweeten with something cider yeast cannot ferment, then prime with ordinary sugar and bottle-condition. The yeast uses the priming sugar and leaves the sweetener alone.

    Check the label: many retail sweeteners are bulked with dextrose or maltodextrin, which ferment and add unplanned pressure. The priming arithmetic is unchanged, because the sweetener itself makes no gas. The sweetness tastes different from sugar, and several protected names — the Traditional Welsh ones among them — exclude non-fermentable sweeteners outright.

    Needs: willing to use a non-fermentable sweetener.

    Priming · Priming sugar · Back-sweetening

  • Lower risk only if every step holds

    Stabilise, back-sweeten, force carbonate and counter-pressure fill

    As above, then moved into bottles against matching pressure.

    The commonest commercial-style route at home scale. Stabilisation is the only thing standing between the sugar and the yeast, and it can fail; if it was skipped or the cider was not clear when it was done, the sugar in the bottle can ferment.

    Needs: willing to use sorbate with sulphite; a co₂ cylinder and regulator; a counter-pressure bottle filler.

    Sorbate stabilisation · Counter-pressure filling

  • Hazardous if any condition fails

    Keeve, then let it condition naturally

    Keeving starves the juice of nitrogen so the ferment slows to a crawl with the fruit’s own sugar left; it is bottled while still barely working and carbonates in the bottle as it finishes. The Normandy and Welsh route to a sweet, lightly sparkling cider.

    The bottle holds sugar and a starved but living yeast, stable only while it stays starved and cool. Warmth or disturbance can restart it with no ceiling on the result. Traditional practice uses heavy glass and a cold cellar; a gravity falling under one point a week before bottling is the usual signal.

    Needs: willing to attempt keeving.

    Keeving · Natural carbonation

  • Hazardous if any condition fails

    Back-sweeten, bottle-condition, then pasteurise in the bottle

    Sweeten, bottle, let the bottles carbonate to the level wanted, then heat them to kill the yeast before the sugar is gone.

    Heating sealed, carbonated glass raises its pressure further: the liquid expands and the gas comes out of solution. Bottles that fail do so violently, and hot water and hot glass scald. CiderHQ gives no procedure for this; producers who do it use rated containers, measured temperatures and guarding.

    Needs: pressure-rated bottles and accurate temperature control.

    Pasteurisation · Bottle over-carbonation

  • Hazardous if any condition fails

    Bottle it sweet and keep every bottle cold

    Bottle a back-sweetened or arrested cider with live yeast in it and rely on refrigeration alone to stop the ferment for the bottle’s whole life.

    The pressure has no upper limit except the sugar, and the protection lasts exactly as long as the cold does. A bottle left out, given away or forgotten in a warm room is a fermentation in sealed glass. Treat any warmed bottle as over-pressurised.

    Needs: room to keep all of it refrigerated until drunk.

    Cold chain · Arrested fermentation

Why sweet and sparkling pull against each other

Carbonation made in the bottle needs two things in it: sugar, and yeast able to eat it. Sweetness that lasts needs the opposite — sugar in the bottle, and yeast that cannot. A cider that is both sweet and conditioned in the bottle is therefore a cider in which the yeast has been allowed to start and then has to be stopped at exactly the right moment, and every route on this page is a different answer to how that stopping is done: by removing the yeast, by inhibiting it, by killing it, by starving it, by chilling it, or by never putting the sugar in the bottle at all.

The answers are not equally safe, and the difference is not one of care. The routes marked hazardous depend on a condition — cold, starvation — that has to hold for the whole life of the bottle, and a sealed bottle whose condition fails has no upper limit on its pressure except the sugar in it. That is what the bottle pressure tool shows in numbers.

Why a keg changes the answer

The same sweet, live cider is an acceptable thing to hold in a keg and a dangerous thing to hold in a bottle. A keg is built for pressure, is monitored through its gauge, and vents through a relief valve before it fails; a bottle does none of those things, and glass fails all at once. That is why several sweet routes are open for a keg and closed for bottles, and why moving a sweetened keg into bottles brings back every question the keg had answered.

The route people overlook

Package the cider dry and sweeten each glass. Nothing in the bottle can referment, the dry cider keeps better than a sweet one would, and each drinker chooses their own sweetness. It is how a good deal of cider has always been drunk, and it removes the hazard rather than managing it. Where a protected name governs what may be called cider, check what it allows: the Traditional Welsh specifications, for example, exclude non-fermentable sweeteners and pasteurisation outright, and permit keeving.

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Where this reading comes from

Guides that reach this calculator, and what the number decides once you have it.